An app store is an online shop for smartphone users. Users can download and purchase different software applications in app store. App stores are cloud-based and users can access the content by means of Web browser and free client software. These apps are particularly popular among smartphone users. Applications have been developed for numbers of purposes including gaming, budgeting, health and other applications. A mobile application also known as Web app, online app, app, smartphone app or iPhone app. Mobile applications regularly serve to give users with related services to those accessed on PCs.

Mobile apps take personal computer based applications and port it to a smartphone or other mobile device. More refined approach involves development of application for specific mobile environment. A mobile application normally known as an app, is a sort of application software which run on tablet computer or smartphone. Apps are usually individual software units and smaller in size with limited function. Apple Inc. has popularized use of this software based app store. App Store of Apple sells number of applications for iPad, iPhone, and iPod Touch.

Originally mobile apps were offered for information retrieval and general productivity applications. This includes calendar, email, stock market contacts, and weather information among others. However, availability of developer tools and rising consumer demand drove rapid expansion of these app stores into other categories, such as factory automation, mobile games, location-based services, order-tracking, banking, mobile medical apps and ticket purchases. The explosion in variety and number of apps led to the creation of an extensive range of review and recommendation. This includes magazines, blogs, and online app-discovery services. Mobile application management is a service and software that controls and monitors...